package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;

@Service
@Slf4j
public class UserServiceImpl implements UserService {
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WeChatProperties weChatProperties;
    public static final String wxlogin="https://api.weixin.qq.com/sns/jscode2session";


    @Override
    public User wxlogin(UserLoginDTO userLoginDTO) {
        //调用微信接口服务 获得当前微信用户的openid
        String openid = getopenid(userLoginDTO.getCode());

        //如果为空 就是失败
        if(openid==null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        log.info("当前用户的openid为：{}",openid);


        //如果不为空 就是成功
        //判断当前用户是否为新用户，如果是新用户自动完成注册  放在数据库里
        User user = userMapper.getbyopenid(openid);
        if(user==null){
            User newuser=User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();
            userMapper.insert(newuser);  //主键返回就是插入时直接把对象的id给赋值
        }

        return user;
    }






    //抽取出来单独的方法
    private String getopenid(String code) {
        //调用微信接口服务 获得当前微信用户的openid
        HashMap<String,String> map = new HashMap<>();
        map.put("appid",weChatProperties.getAppid());
        map.put("secret",weChatProperties.getSecret());
        map.put("js_code",code);
        map.put("grant_type","authorization_code");

        String json = HttpClientUtil.doGet(wxlogin, map);

        JSONObject jsonObject = JSON.parseObject(json);
        String openid = jsonObject.getString("openid");
        return openid;
    }
}
